Apparatus for setting the dies of wire-drawing machines



R. D. CONNOR AND R. P. SLINGER. APPARATUS FOR SETTING THE DIES O'F WIRE DRAWING MACHINES.

' APPLICATION FILED JUNE 2, I919.

1,367,686; Patented Feb. 8,1921.

5 SHEETS-SHEET I.

R. D. CONNOR AND R. P. SLINGER.

APPARATUS FOR SETTING THE DIES 0F WIRE DRAWING MACHINES. APPLICATION FILED IUNE2,19I9.

1,367,686. Patented Feb. 8, 1921.

I I I I I I I l I I I I I I I I I l I I I I I I I I I I I I I I I 7715? H Troz NE Y R. D. CONNOR AND R. P. SL|NGER.

APPARATUS FOR SETTING THE DIES 0F WIRE DRAWING MACHINES- APPLICATION FILED JUNE 2, 1919.

1,367,686. Patented Feb. 8,1921.

5 SHEETSS HEET 3.

R. D. CONNOR AND H. P. SLINGER.

APPARATUS FOR SETTING THE DIES OF WIRE DRAWING MACHINES. APPLICATION FILED JUNE 2, 1919.

1,367,686. Patented Feb. 8, 1921.

5 SHEETS-SHEET 4.

wrk/vroess $0M m {0mm R. D. CONNOR AND R. P. SLINGER. APPARATUS FOR SETTING THE DIES 0F WIRE DRAWING MACHINE-S. APPLICATION HLED JUNE 2, I919 1,367,686, Patented Feb. 8, 1921.

5 SHEETS-SHEET 5.

UNITED STATES PATENT OFFICE.

ROBERT DUNCAN CONNOR AND ROBERT PERCIVAL SLINGER, OF ,MANGHESTEB,

' ENGLAND. r

APPARATUS FOR SETTING THE DIES 0F WIRE-DRAWING MACHINES.

Specification of Letters Patent. 7,

Patented Feb. 8, 1921.

Application filed. June 2, 1919. Serial No. 301,308.

To all whom it may concern:

Be it known that .we, ROBERT DUNCAN CONNOR and ROBERT PERCIVAL SLINGER, both subjects of the King .of Great Britain and Ireland, and residents of Manchester, England, have invented new or Improved Apparatus for Setting the Dies of Wire-Drawing Machines, of which the following is a specification.

The die of a wire drawing machine usually consists of a small rectangular block of steel with a tapered and trumpet shaped hole through the center of the block, the narrower end of the hole being of the gage to which the wire has f to be drawn. he die sometimes consists of a plate with a series of holes. In order to keep the die, or die plate in proper working order, it is necessary to periodically reset the hole or holes, 11. a, partly close the hole, or holes, and reform it, or them, to the required shape and size. v

The object of this invention is to provide improved apparatus for effecting the setting of wire drawing dies for all sizes of wire, so that the setting may be done quickly and positively, the correctness of the setting for dies in all stages of use depending upon the preliminary adjustment of the machine and not upon the operators judgment, or skill in practice, and in which the die is self-alining so that there is no' liability for the setting tools to be broken in use even when setting the finest gages.

The invention Will be described with reference to the accompanying drawings where- 1n:-

Figure 1 is an end elevation, and

Fig. 2 a part front elevation (to a larger scale) of a machine constructed according to the invention.

Fig. 3 is a detail view of the top half of F i 1 also drawn to a larger scale.

Fig. 4 is a view similar to Fig. 3 taken on the line 4, 4 of Fig. 2, and showing the tool in its lowermost position.

Figs. 5 to 7 illustrate to a larger scale, the lower ends of the several tools, the die support (partly in section) for each tool, and in each case" a die under treatment, the die being in section.

- nected to said table, the uprights 0 being secured in sockets in the brackets d by means of the set screws (1.

A further set of brackets e, e, e are secured to the uprights 0, one at the top of each, by means of the set screws 6'. Each bracket e is extended forwardl and bored at e to receive the tubular sli ing member 6 in which is located the rotatin spindle e driven from the cross shaft f throughthe pulleys f, e and belt 7, the pulley e being keyed to the spindle e. Each spindle 6* is provided with a tool holder or chuck e and said spindles are raised and lowered by means of the lever g pivoted at g to a link g which is pivotally connected at g to an extension e of the bracket 6, the lever 9 being pivotally connected at g to the tubular member 6 The spindles e are normally retained in the raised position by means'of the springs 9 but are lowered by means of the toggle links h, h a handle it being provided for manipulating purposes.

A forward extension of each bracket d is formed as a clamp d to receive a rod or tube 2' in the top end of which is screwed the tubular die support 2" and upon the lower 'end of which can be clamped a box 2' to hold lubricant. A rotating table 7' is provided on the table a to hold the dies in a handy position for the operator. The cross shaft 7 is driven from any convenient'source of power by means of: the belt f which 1s thrown on to the fast or loose pulley f, f by ing adjustable by adjusting the height of the bar 2' in the clamp d The procedure in setting a die, according to this invention, is as follows :First, the

ilie. after being hammered to close the narrow end of the hole, see 'Flg. 8, 1s placed IO Kuired size for this stage of the setting.

i for ,use.

then lowered into and through the die, until.

the toggles h, h assume the straight line position and stop the further downward movement of the tool by which time the required amount of metal has been removed, and the-hole in the die, brought to the refter raising the tool the die is transferred to the next suppot 2" when the tool Zis lowered, see Fig.6. Such tool is a plain round tapered tool, and is intended to burnishthe inner: face of the die, and thereby also harden it and also slightly enlarge the hole. After thus hardening the inner face of the die, the die is transferred to the next support 2" when the next-tool m is lowered,

'such tool consisting of a hardened and tempered steel wire which serves as a gage for setting the narrowest part ofthe hole, see Fig. 7. With this last named operation the' sharp edges at the entrance of the .hole are burnished down and the corners made practically rectangularw The die is then ready Owing to the die supports 5'. being comparatively small in diameter and tubular,

they support the die at poi'iits near to and concentric with the hole in the die. In

this way,-the supports, in conjunction with the fixed predetermined distance the tools move ,down, regulate the extent to which said tools' enter the die and insure. that the narrow end of the hole in the die shall always be the correct diameter for the intended gage of wire to be drawn, no matter what the depth of the sinking. in the face of the die may be.

T heinvention is applicable to the setting of dies for all gages of wire, 2'. e., from the The method of set-.

largest to the smallest. ting a die or die plate, herein described allows of the correct diameter of hole being positively obtained at one operation, whereas with the ordinary method of setting by hand it often happens that, when punching the hole, too much metal is removed and the die has to be rehammered, and again punched, one or more times, before the corvrect diameter of, hole is obtained. Further,

the operator has to be an expert to do the .is assured, and by enabling the setting to be done by unskilled persons in a minimum of time "a considerable saving in the cost of production may be effected.

What we claim is 1. A machine for setting wire drawing dies, or die plates comprising a support,-uprightscarried'by the supports rotating spindles slidably mounted on the uprights, tool holders at the bottom of the spindles reamering, burnishing and setting tools in the respective tool holders, toggle links through which the tools are lowered to a given extent, a tubular .stop' to receive and maintain the die with the die face at a fixed point relatively to the respective tool, substantially as described. i

2. A machine for setting wire drawing dies, or die plates, comprising, in combination, a reamerin'g tool and burnishing tool mounted in operating elements each comprising a tool-spindle rotatably and slidably mounted on a stand, a pivoted lever connected to the spindle, a spring at one end of said lever and hand operated togglelinks at the other end, together with tubular die supports'and clamps to adjustably position said suppoArts, substantially as described. dies, ordie plates, comprising in combination reamering, burnishing and setting tools mounted in operating elements, each comprising a tool spindle rotatably and slid ably mounted on a stand, a pivoted lever our hands in the presence of two witnesses.

ROBERT DUNCAN CONNOR. ROBERT PERCIVAL Witnesses:

FREDERICK J. MEREDITH, HY. JUNCA.

machine for setting wire drawing 

